Modeling of subsurface cracking in railroad wheels 2. Analysis of dynamic wheelrail interaction caused by measured. Prediction of fatigue crack initiation life in railheads using finite. Since the early 1970s, numerical simulations of the dynamic behavior of rail vehicles and the interaction between vehicle and track have been performed. Performance analysis of wheel and rail contact by nature of. Technology unit at manchester metropolitan university, where he specialised in railway vehicle dynamic modelling and wheelrail interaction. Analysis of wheelrail interaction using fe software has been studied by sladkowski and sitarz 4. Hence, the wheelrail rolling contact has been a hot issue. The quasihertz method as well as a finite element fe method were included as basis of mathematical simulation.
For numeric simulation, the transient wheelrail rolling contact in railway system is a very complex and timeconsuming process. Overview 2 part 1 the wheel rail interface anatomy and key terminology. Kevin oldknow chief engineer, wheelrail interface l. Dynamic analysis of interaction between vehicle wheel with a metal protuberance and rail marijonas bogdevicius1. It contains an introduction and the following papers. The solid model of rail wheel contact model is created in catia v5. Kropp chalmers university of technology, division of applied acoustics, se41296 gothenburg. Wheelrail interaction is one of the most important research topics in railway engineering. Calculations and analysed results, obtained by using the newly.
The wheel has a s1002cn tread and the radius of 430 mm, while the rail is the 60 kgm steel rail with a base slope of 1. The wheel rail interaction conference offers one of the best educational, networking and professional development values in the industry. The model of the moving irregularity is much easier to use and it is currently utilized for the frequencydomain analysis 5. May 12, 2017 the whole finite element model for wheelrail rolling contact was built using commercial software hypermesh, which includes two wheels the one with a fresh flat, one axle and two rails. An adaptive contact model for simulation of wheelrail. There are enormous challenges before indian railways 1. Performance analysis of wheel and rail contact by nature. The wheel has a s1002cn tread and the radius of 430 mm, while.
Appendix a effect of wheelrail profiles and wheelrail. Wheel rail interface monash institute of railway technology. And, of course, you cant optimize wheelrail interaction if you cant measure it. The solution of frictional wheelrail rolling contact with a 3d. The guidance of railway vehicles is determined by a complex interaction between the wheels and rails, which requires a detailed characterization of the contact mechanism in order to permit a correct analysis of the dynamic behavior. The measured irregularities are utilized to evaluate vehicletrack interaction effects by use of a vehicletrack coupled dynamics model. Monash irt and jakarta mrt partnership on indonesian railway projects recycled plastic is the new material for heritage railway sleepers. The aim of this paper is to study the influence of rail flexibility when a wheelrail wear prediction model that computes the material loss based on an energy approach is used. Dynamics analysis of wheel rail contact using fea sciencedirect. A fast timedomain model for wheelrail interaction demonstrated for the case of impact forces caused by wheel ats a.
Investigation on fatigue life of railwheel assembly using finite. Selected european wheel profiles were investigated on track with. Ansys software is utilized with the purpose of simulating the system. Discussion of the results received with the help of fem. The simulation results shows that the maximum stress. The work is presented in the five appended papers that are summarised below. The stressstrain of thin multilayered coatings covered the surface of the rail is studied near the region of side contact in turning motion. The solid model of railwheel contact model is created in catia v5. Fourier series are used to mathematically describe the geometry of vehicle wheel with a metal protuberance. Pdf analysis of wheelrail interaction for the development of a new. Journal of computational and nonlinear dynamics, vol.
This study adopts measured wheel geometry and an elasticplastic material model for the simulations to provide an comprehensive understanding of the transient. Considerable benefits can be gained through appropriate wheelrail interface management, including reduced defect rates, improved safety, extended wheel and rail life, improved vehicletrack interaction, reduced wheelrail noise and the development of suitable standards and maintenance procedures. Dynamic explicit analysis has been used for the simulation of a moving load, and the train speed effect has been studied. The rolling contact of a wheel on a rail is the basis of many railwheel. Pdf stress analysis on rail wheel contact semantic scholar. This study combines structural failure analysis, finite element analysis, fracture mechanics, and reliability analysis methods to develop a new methodology to analyze and simulate railroad wheel failure. Without having an appropriate understanding of the wheelrail interaction, the essential safety analysis of stability and derailment or the ride comfort analysis are incomplete 2. A new solution method for wheelrail rolling contact. Foster rail technologies with the assistance of and permission from sahha 2015 technical workshop, birchwood hotel 8.
The wheelrail contact has been of crucial interest to the railway engineers. Interface journal the journal of wheelrail interaction. Handbook of railway vehicle dynamics simon iwnicki download. A dynamic wheelrail impact analysis of railway track. A part of wheel motor consists of a driving motor, a driving a part of rail motor consists of a braking motor, a braking motor axis, torque sensor, an encoder and rail specimens. Improving performance, finite element analysis, wheelrail interaction, coupling strategy. A new wheelrail contact model for railway dynamics. Appendix a effect of wheelrail profiles and wheelrail interaction on system performance and maintenance in transit operations unfortunately, this book cant be printed from the openbook. Performance analysis of wheel and rail contact by nature of material characteristics a contact mechanics approach v. The whole finite element model for wheelrail rolling contact was built using commercial software hypermesh, which includes two wheels the one with a fresh flat, one axle and two rails. Through mathematical analysis and practical examples, it builds a deep and functional understanding of the wheelrail interface, suspension and suspension component design, simulation and testing of electrical and mechanical systems, interaction with surrounding infrastructure, and noise and vibration. Application of sensitivity analysis in design of characteristics of damping joints in locomotive running gear jaromr zelenka, martin kohout, tom. Olofsson, contact mechanics analysis of measured wheelrail profiles using the finite element method journal of rail and rapid transit, proc.
To investigate wheelrail interaction resulting from actual outofround wheels, wheel radial irregularities are measured from chinese 25g passenger trains. With these tools, distribution of contact zones, contact stress and contact pressure for different configuration of the wheel and rail profiles are obtained. The contact addon to gensys is fully integrated in gensys, allowing to incorporate detailed wheelrail contact analysis in various vehicle dynamics scenarios. Analysis of rail wheel contact stresses by using ansys ansys is finite element analysis software which enables engineers to perform the following tasks. Analysis of wheel rail interaction using fe software has been studied by sladkowski and sitarz 4. Huimin wu transportation test center, inc, pueblo, co number of words. We are specialists in wheelrail interaction, and much of our work employs computer modelling to simulate the dynamic behaviour of railway vehicles and what occurs in the contact patch between the wheel and the rail. The data analysis software computes the contact parameters by placing each wheelset on the measured rail pair. Pdf dynamic analysis of wheelrail interaction using finite. Rail transit seminar wheel rail interaction conference 2017.
Foster rail technologies with the assistance of and permission from sahha 2015 technical workshop, birchwood hotel 8 october, 2015. This paper presents an analysis of the transient wheelrail frictional rolling impact contact using an explicit finite element model of the dynamic interaction between the wheel and fbfc. Wheelrail interaction, explicit finite element model, contact. Problem of wheelrail profiles design exists for many years and different approaches have been developed to obtain satisfactory wheelrail profile combinations. The results obtained from fe analysis were combined with the critical plane approach and. A robust finite element analysis of the railwheel rolling contact. Analysis of wheelrail interaction using fe software aleksander. Since 1994 we have hosted speakers and attendees from around the globe, bringing focus and understanding to the critical area of wheelrail interaction. The maximum operating speed for realtime data analysis can now reach up to. Causes of rail cant and controlling cant through wheelrail interface management brad kerchof norfolk southern railway, roanoke, va dr. The importance of wheelrail interface on energy savings. Effect of wheelrail interface parameters on contact stability in. The dynamic model of the vehicle body, a freight bogie and the truck systems of uic60 rail were modelled and analysed using an explicit method with a commercial fe software considering the real. Analysis of wheel rail interaction using fe software 1.
A steel wheel requires very little energy to roll on a steel rail. Modelling and simulation of dynamic wheelrail interaction. Performance analysis of wheel and rail contact by nature of material characteristics. In 2012, the rail technology unit transferred to the university of huddersfield to form a new group specialising. Appraisal of contact stresses, surface cracks, and plastic deformations in rails and wheels has always been an important issue in mechanical and railway engineering because of two main reasons. Calculations and analysed results, obtained by using the newly developed method, when a wheel defect has a metal protuberance, are presented in this work. Analysis of wheelrail interaction for the development of. Stress analysis can be done using analytical methods, experimental methods, and using tools like. Moreover, the effect of contact forces and contact stresses on the deformation of rolling wheels and rails were also evaluated. As a result, the railways are subjected to additional loads which produce a higher level of strains and stresses. The mathematical and numerical studies were done by using quasihertz and fe analysis to analyze the impact of the interacting wheel and rail profiles on the distribution of contact zones and stresses. Contact mechanics analysis of measured wheel rail profiles using the finite element method all machine elements working in contact are subject to various degradation mechanisms. The wheel rail contact has been of crucial interest to the railway engineers. To simulate the 3d contact interaction analysis of railwheel, the.
This interaction is a specialist subject covering the design and management of the very high stresses in the small contact area between a steel wheel and steel rail. One of the most important questions relating to the exploitation. Their fe model consists of a part of the wheel and the rail with insulating. This paper is a revised and expanded version of an article entitled, contact stress analysis in wheelrail by hertzian method and finite element method presented in national conference on recent advancements in mechanical engineering held at north east regional institute of science and technology, arunachal pradesh. Liu, xiaoyuan, zhai, wanming and bruni, stefano 20 analysis of dynamic wheelrail interaction caused by measured outofround railway wheels. Since the early 1970s, there have been numerical simulations of the behaviour of rail vehicles and of the interactions between vehicles and track. This proposed model adapts the contact length, contact depth and incorporates possible partial and asymmetry of the contact due to defective wheel profile. Reasonable solution method would reduce the computational effort and improve the solution efficiency in a certain extent. Modelling and simulation of dynamic wheelrail interaction using a roller rig a anyakwo, c pislaru, a ball and f gu centre for diagnostic engineering, university of huddersfield, queensgate, huddersfield hd 1 3dh, united kingdom email. Causes of rail cant and controlling cant through wheel. Part 1 3 the wheel rail interface anatomy and key terminology the contact patch and contact pressures creepageand traction forces. Finite elements analysis of the railwheel rolling contact. By bob tuzik for three years running, new york city transit and the federal transit administration have kicked off the annual wheelrail interaction rail transit conference with discussion of the nyctfta research project to explore integrated wheelrail analytics on mtanycts no. The finite element method analysis was carried out in abaqus software.
A vehicletrack interaction model incorporating a 2d roll. This research is divided into four objectives as follows. Improving the performance of finite element simulations on the. With the development of modern computing techniques and the. Wheel rail interaction call for papers trains magazine. Without having an appropriate understanding of the wheel rail interaction, the essential safety analysis of stability and derailment or the ride comfort analysis are incomplete 2. Pablo antolin, jose maria goicolea, javier oliva, miguel angel astiz. Analysis of wheelrail interaction using fe software.
Wheel rail interface rail adhesion from wikipedia, the free encyclopedia. Dynamic analysis of wheelrail interaction using finite. The wheelrail wear model used in this investigation is a simplified combined wear hypothesis that is based on the frictional energy loss in the contact patch. Study on the adhesion characteristic between wheel and. The mesh and mesh density of wheelrail finite element models. The characteristics of the wheelrail interaction are analysed in both time and frequency domains. The railway transportation system is nowadays one of the most important systems for land transport because its increased load carrying capacity, high speed, low costs, connectivity and ecologic features. The main part of the finite element modeling involves the steadystate dynamic analysis, in which receptance functions were obtained and used as the criterion for evaluating the dynamic properties of track components. Sathish gandhi department of mechanical engineering, university college of engineering nagercoil, anna university.
Pdf a robust finite element analysis of the railwheel. Numerical analysis for investigating wheelrail impact. The issue of the wheelrail interaction may be solved in two different waysusing either the model of a moving irregularity between a stationary wheel and rail, or the model of a moving wheel along the rail. The irrs work is split between research and consultancy projects.
The 24th annual wheel rail interaction conference will be held april 30 to may 3, 2018, at the crowne plaza chicago ohare hotel, in rosemont, ill. Handbook of railway vehicle dynamics simon iwnicki. The paper is focused on the interaction between tram wheel and rail, which was. Trains is the presenting sponsor of wheel rail interaction. This allows to compute vehicle stability and inspect derailments using kalkers full theory.
And, of course, you cant optimize wheelrail interaction if. The rail wheel assembly is assumed to operate under the designed load. Introducing the uks first tramtrain railway technology. The wheelrail interface is the contact area where wheelrail interaction between wheels and rails in railways takes place. Stecco, university of florence, italy abstract the numerical simulation of system dynamics is today a standard in the design. The analytical formulation is based on timoshenkos approach and finite element method fem based simulation of the problems is undertaken. Nonlinear trainbridge lateral interaction using a simplified wheelrail contact method within a finite element framework. Fundamentals of wheelrail interaction michael roney consultant and retired chief engineer, canadian pacific dr. If you need to print pages from this book, we recommend downloading it as a pdf. Considerable benefits can be gained through appropriate wheel rail interface management, including reduced defect rates, improved safety, extended wheel and rail life, improved vehicletrack interaction, reduced wheel rail noise and the development of suitable standards and maintenance procedures. The wheelrail contact is modeled using nonlinear hertzian contact theory.
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